<template>
    <div class="wrapper">
        <swiper :options="swiperOption" v-if="showView">
            <!-- slides -->
            <swiper-slide v-for="item of list" :key="item.id" >
                <img class="swiper-img" :src="item.imgUrl"/>
            </swiper-slide>
            <div class="swiper-pagination"  slot="pagination"></div>
        </swiper>
    </div>
</template>

<script>
export default {
    name:'HomeSwiper',
    props:{
        list:Array
    },
    data () {
        return{
            swiperOption:{
                pagination:'.swiper-pagination',
                loop:'true'
            }
        }
    },
    computed:{
        //初始化创建是根据空数组创建的。 所以如果是空的时候 v-if是false 所以swipe不会被创建
        showView () {
            return this.list.length
        }
    }
}
</script>
<style lang="stylus" scoped>
  .wrapper >>> .swiper-pagination-bullet-active
    background: #fff
  .wrapper >>>  .swiper-container-horizontal > .swiper-pagination-bullets
    bottom:.2rem
  .wrapper
    overflow: hidden
    width: 100%
    height: 0
    padding-bottom: 31.25%
    background: #eee
    .swiper-img
      width: 100%
</style>



